Heat-insulated metal-framed closure



Dec. 17, 1963 w. L. BRIGGS v 3,114,179

HEAT-INSULATED METAL-FRAMED CLOSURE Filed Dec. 1, 1960 2 Sheets-Sheet 1HVVENTUR. c; mum/w z. ale/ass 0W w/azyflez,

Dec. 17, 1963 w. L. BRIGGS HEAT-INSULATED METAL-FRAMED CLOSURE 2Sheets-Sheet 2 Filed Dec. 1, 1960 INVENTOR. I WILLIAM L. amass BY IQWY aUnited States Patent O 3 114 179 HEAT-INSULATED thump-FRAMED CLOSUREWilliam L. Briggs, Gait Harbor, Ghio, assignor to Window gigioducts,Ina, Gal; Harbor, Ghio, a corporation of Filed Dec. 1, 196%), Ser. No.72,932 Ill (Ziaims. (Q1. -565) This invention relates to metal-frameddouble-panelled closures and, in particular, to heat-insulatedmetalframed double-panelled closures, such as windows, doors and thelike.

One object of this invention is to provide a heat-insulated metal-frameddouble-panelled closure, such as a door, window sash and similar panelshaving metal external and internal closure frame members adapted to berolled from sheet metal or extruded at low cost, and held in assembly byan insulating member in the form of a strip of resilient material havinga cross-sectional shape which clamps the closure frames tightly intoengagement with the panels yet which positively prevents conduction ofheat along any metallic path between the external and internal closureframes.

Another object is to provide a heat-insulated metalframeddouble-panelled closure of the foregoing character wherein theinsulating strip is of approximately T- shaped cross-section with atransverse portion disposed approximately perpendicular to the planes ofthe panels and a wedging rib disposed approximately perpendicular to thetransverse portion, the opposite ends of the transverse portion beingseated in channels formed in the outer and inner closure frame membersand the wedging ribs resiliently urging the outer portions of theclosure frame members apart from one another so as to compress the innerportions tightly against the window pane unit while flexing around thetransverse portion as a fulcrum.

Another object is to provide a heat-insulated metalframeddouble-panelled closure of the foregoing character wherein the externaland internal closure frame members, in addition to possessing channelsin which the opposite ends of the transverse portions of the insulatingstrip are seated, also have flanges along their outer edges disposed inapproximately spaced parallel relationship and closer to one anotherthan the remaining portions of the closure -frame members in such amanner as to be engaged by the wedging rib of the insulating strip andurged away from one another by the resilience of the wedging rib.

Another object is to provide a modification of the foregoingheat-insulating metal-framed double-panelled closure wherein the channelportions of the external and internal closure frame members extendsubstantially from an inner flange forming the bottom of the troughwhich receives the panel edges to the outer edge of the closure frame,and wherein the insulating strip has a correspondingly enlargedcross-section and a correspondingly-reduced rib, with the result thatthe insulating strip has the approximate shape of an elongated bar ofresilient insulating material with outer and inner channels respectivelyreceiving the outer and inner flanges of the external and internalclosure frame members.

Another object is to provide a modified heat-insulating metal-frameddouble-panelled closure, as set forth in the object immediatelypreceding, wherein the insulating strip in its relaxed condition isapproximately of truncated sector-shaped cross-section causing the sideportions of the external and internal sash rails to converge inwardlytoward one another so that when the insulating strip is forciblydeformed into approximately rectangular crosssection by pressure uponthe outer corner edges of the external and internal closure framemembers, the inner edge portions thereof move apart from one another soas to permit insertion of the panel unit into-the trough thus formed,whereupon release of such pressure causes the resilient insulating stripto'seek to resume its original shape and thereby cause the inner edgesof the side portions of the external and internal closure frame n1embersto tightly grip the external and internal sides of the panel units insubstantially weather-tight engagement.

Other objects and advantages of the invention Will become apparentduring the course of the following description of the accompanyingdrawings, wherein:

FIGURE 1 is a fragmentary perspective view of a corner portion of aheat-insulated metal-granted doublepanelled closure according to oneform of the invention, with the panel unit clamped in position betweenthe external and internal closure frame members by the action of theresilient insulating strip;

FIGURE 2 is a cross-section taken near the left-hand end of FIGURE 1;

FIGURE 3 is a diagrammatic view in cross-section similar to FIGURE 2 butshowing the relative position of the parts at an intermediate stageduring assembly with the external and internal closure frame membersforced apart from one another in order to admit the panel unit;

FIGURE 4 is a perspective view of the lower portion of a modifiedheat-insulated metal-framed doublepanelled closure employing a modifiedresilient insulating strip of approximately rectangular cross-sectionwhen assembled but of truncated sector-shaped cross-section whendisassembled and relaxed;

FIGURE 5 is a cross-section through a portion of the closure frame ofFIGURE 4 in relaxed condition with the panel unit removed;

FIGURE 6 is a diagrammatic view in cross-section similar to theleft-hand end of the perspective view of FIGURE 4, but showing therelative positions of the parts at an intermediate stage during assemblywith the external and internal closure frame members forced apart fromone another in order to admit the panel unit;

FIGURE 7 is a cross-sectional view of a modification of the insulatingstrip of FIGURE 5 having a fulcrum core extending therethrough;

FIGURE 8 is a cross-section through a portion of the closure frame ofFIGURES 1, 2 and 3 in relaxed condition with the panel unit removed;

FIGURE 9 is a view similar to FIGURE 8, but showing a modification inwhich the wedging portion of the insulating strip is made separate fromthe connection framed double-panelled closure, generally designated 10,according to one form of the invention as consisting generally ofaclosure frame or molding assembly 12 having external and internalclosure frame units 14 and 16 respectively composed of external andinternal closure frame members 18 and 2% respectively separated from oneanother by heat-insulating strips 22 of resilient ma terial. The closureframe 12 is adapted to tightly grip a double-panelled closure unit 24which is sealed by a chann'el-shaped sealing member or layer 26 of bentnon-metallic sheet insulating material, such as sheet plastic material,or a layer of suitable sealing and insulating 1118-,

one of a number of double-pane window units available commercially onthe market under various trade names, the form shown being illustrativeand not limiting. The particular double-panelled closure unit 24consists of external and internal panels 30 and 32 respectively facingrespectively the exterior and interior of the building in which theclosure is located. The panels 30 and 32 may be of glass or othersuitable transparent or translucent material or may be opaque if lighttransmission is not desired, and are spaced apart from one another by atubular desiccant holder, generally designated 34, of hollowapproximately rectangular cross-section.

The desiccant holder 34, as its name suggests, is adapted to hold adesiccant for removal of any moisture from the space 36 between thepanels 30 and 32. For

that purpose, the desiccant holder 34 is so constructed as to permitcirculation of air between the i-nterpanel space 36 and the desiccantchamber 38, such as by loosely overlapping the side walls of thedesiccant holder 34, as shown in the drawings. Alternatively, the innerwall of the desiccant holder 34 may be perforated at intervals tofacilitate such circulation of air for removal of moisture therefrom.

The sealing member 26, as previously stated, may consist of a strip ofnon-metallic sheet insulating material, such as sheet plastic, bent intochannel-shaped form or, in the alternative, may consist of a layer ofsuitable insulating sealing material, such as plastic or asphalticmaterial extending between the exposed suufaces of the panels 30 and 32around their outer edges and across the gap between them occupied by thedesiccant holder 38. In either case, the assembly 24 forms an air-tightand moisture-tight sealed assembly in which the iuterpanel space or airchamber 36 is maintained dry by the desiccant in the desiccant chamber38.

The external and internal closure frame members 18 and 20 of theexternal and internal closure frames 14 and 16 of the closure frameassembly 12 are of similar but oppositely-facing construction andcross-section, hence a single description will suflice for both. Eachclosure frame member '18 or 29 consists of a base portion 40 (FIGURE 2)having spaced inner and outer flanges 42 and -44 respectively defining arabbet 46 forming a closure panel edge seat into which the closure unit24 fits and an inner channel 48. The outer flange 44 is provided at itsedge with an outwardly-bent extension 50 disposed in spaced parallelrelationship with the base portion 40. The inner and outer flanges 42and '44 have inturned edges 52 and 54 respectively directed toward oneanother at acute angles to their respective flanges 4-2 and '44 in thedirection of the base portion 40.

The base portion 49 has an inner portion 56 adapted to engage theclosure panel unit 24, an intermediate portion 58, and an outer portion60 which enter into the assembly operation discussed below. The innerand outer flanges 42 and 44 are substantially perpendicular to the baseportion 4-6 of the closure frame members 18 or 20, whereas the flangeextension 50 is perpendicular to the outer flange 44 and substantiallyparallel to the base portion 40. The closure frame members $18 and 20 ofFIG- URES 1 to 3 inclusive are preferably formed by the extrusion of asuitable metal, such as aluminum or aluminum alloy, or they may beformed by rolling operations upon sheet metal ribbon or strip stock, ina manner analogous to that used in the formation of the modification ofFIGURES 4, and 6 described below. The processes of making the closureframe members 18 and 20 are beyond the scope of the present invention.

The heat-insulating member or strip 22, as previously stated, is ofapproximately T-shaped cross-section (FIG- URE 2) with a transverseconnecting portion 62 having a slight central inner ridge or bulge 64 onthe opposite side of the transverse connecting portion 62 from thewedging rib or portion 66. The opposite sides 68 of the transverseportion 62 of the strip 22 comprise enlarged a A ribs engaged on theirinner sides by the intur-ned edges 52 and 5-4 of the flanges 4-2 and 44with a clinching, locking or gripping action. The wedging rib or portion66 forming the outer portion of the insulating member 22 projectsoutwardly from and substantially perpendicular to the transverse portion62 and is separated from it by a neck portion 70 of reduced Width. Thewedging rib 66 is preferably of gene-rally circular cross-section andmay be torn oii or severed at the neck portion '70 for replacement by awider wedging rib 66 where needed (FIG- URES 9 and 10).

The heat-insulated member or strip 22 is preferably formed of elasticdeformable material, such as natural or synthetic rubber or resilientsynthetic plastic. The wedging rib 66 which projects outwardly from thetransverse portion 62 is of such width or cross diameter as to be in astate of compression between the flange extensions so when the innerportions 56 of the base portion 40 are in tight clamping and sealingengagement with the closure panel unit 24. As a consequence, the crossdiameter of the outwardly-projecting longitudinal rib 22 may differ forclosure panel units 24 of different thicknesses in order to effect sucha tight sealing engagement. The meeting edges 72 (FIGURE 1) of the outerand inner closure frame members 18 and 29 are mitered or cut atapproximately 45 degree angles to meet one another at the corners of theclosure frame 12. The oppositely-facing rabbets i6 collectively form atrough 74 which receives the closure panel unit 24, as described below.

In the operation of assembling the heat-insulated metalframeddouble-panelled building closure 10, assuming the outer and innerclosure frame members 18 and 20 of the outer and inner closure frames 14and 16 .to be cut to the proper length for the size of closure 10desired, and also assuming that the insulating members 22 are cut intosimilar suitable lengths, the insulating members are inserted betweenthe outer and inner closure frame members 18 and 20 by sliding theirenlarged sides 68 longitudinally into the channels 48 between the innerand outer flanges 42 and 44. The inturned edges 52 and 54 engage theenlarged sides 63 and consequently hold the outer and inner closureframe members 18 and 20 in assembly. At the same time, theoutwardly-projecting rib portion 66 slides through and along the spacebetween the parallel extensions 51) of the outer flanges 44, urging themapart and consequently urging the base portion 40 of the closure framemembers 18 and 20 into inwardlyconverging non-parallel relationship inthe relaxed condition thereof before the closure panel unit 24 isinstalled (FIGURE 8).

The assembly thus formed of the outer and inner closure frame members 18and 20 and insulating strip 22 is then placed in the gap G of jaws J andJ' of a suitable vise or other compressing appliance V (FIGURE 3), withthe jaws J and I engaging the outer portions 60 of the bases 40 of theouter and inner closure frame members 18 and 20. The jaws J and J arecaused to move relatively toward one another so as to narrow the gap G,

thereby causing the bases 40 to move into diverging nonparallelrelationship (FIGURE 3) around the central connecting portion 62 of theinsulating member 22 as a' fulcrum, flexing the outer sides 68relatively thereto and laterally compressing the rib 66 between theflange extensions 50. The parts by this procedure have now 2.5-

sumed the relative positions shown in FIGURE 3 with a divergent channel74 formed between the rabbets 46.

Meanwhile, two other assemblies of external and internal closure framemembers 18 and 2t) and heat-insulating strips 22 have been placed at themitered opposite ends 72 (FIGURE 1) of the previously-assembled closureframe members 18 and 2t) and insulating member 22 and secured thereto inspaced relationship, thereby forming three sides of the closure frame ormolding assembly 12 with the fourth side open for insertion of theclosure panel unit 24. The three assemblies are then spaced apart in themanner described above to provide divergent channels 74 in each,whereupon the closure panel unit 24 is slid into place in the divergentchannels 74 thus formed, with the corners of the sealing member 26entering the rabbets 46 of the outer and inner closure frame members 18and 20 and coming to rest against the inner flanges 42 thereof.

The operator then moves the jaws I and I of the vises V outwardlyrelatively to one another so as to Widen the gaps G between them.Thereupon the resilience of the compressed outer rib portion or side 68of each resilient heat-insulating member 22 pushes the adjacent flangeextensions 50 apart from one another around the central strip portion 64as a fulcrum, causing the transverse connecting portion 62 of eachinsulating member 22 to straighten out (FIGURE 2) and the inner baseportions 56 to enter into snug clamping engagement with the sides of thesealing member or layer 26 of the closure panel unit 24.

The fourth or remaining side of the closure frame 12 is then inserted inthe gap between the ends of the spaced closure frame members 18 and 29,completing the assembly in a similar manner while the remaining closureframe members 18 and 20 are spread apart in the above-described manner,as by the use of a clamping device having an action similar to that ofthe vise V.

The modified heat-insulated metal-framed doublepanelled closure,generally designated 80 (shown in FIG- URES 4, 5 and 6 consistsgenerally of a closure frame or molding assembly 82 having external andinternal closure units -84 and 86 respectively composed of external andinternal closure frame members 83 and 9t} separated from one another byresilient heat-insulating strips 92 of elastic deformable material. Theclosure frame 82 is adapted to tightly grip a double-panelled closureunit 94 sealed by a channel-shaped sealing member or layer 26 of bentnon-metallic sheet insulating material, such as sheet plastic material,or a layer of suitable sealing and insulating material applied thereto.

The double-panelled closure unit 94 is similar in construction to thedouble-pane closure unit 24, hence simi lar parts are designated withthe same reference numerals. The external and internal closure panels 30and 32 are shown in FIGURES 4 and 6 to be slightly thinner than theclosure panels 30 and 32 of FIGURE 2 merely to be able to show the rangeof adaptation of the invention.

The external and internal closure frame members 88 and 90 are shown inFIGURES 4 to 6 as constituting rolled sections formed from sheet metalrather than the extruded sections constituting the closure frame members18 and 29 of FIGURES l, 2 and 3. The rolling of such sections as theclosure frame members 88 and 99 presents no problem to those skilled inthe sheet metal rolling art and is carried out upon conventional rollingmachines and processes, both of which are beyond the scope of thepresent invention. Each of the closure frame members 83 and 99 consistsof an exposed base portion 96 having a perpendicular flange 98 at itsouter edge terminating in a parallel flange extension 100. Each closureframe member 88 or 90' also has a reversely-bent portion 162 extendingfrom the inner edge of the base portion 96 parallel thereto forapproximately one-half of its width at which point it is provided with aperpendicular flange 104 disposed in spaced parallel relationship to theperpendicular flange 98 and similarly having a parallel flange extension166 extending toward the flange extension 190 (FIGURE 5). In thismanner, each of the closure frame members 88 and 9% is provided with anouter channel 108 for receiving the opposite sides of the insulatingstrip 92 and is also provided with a rabbet 110. The corresponding butoppositely-facing rabbets 110 in the closure frame members 88 and 90collectively form a trough 112 adapted to receive the double-panelledclosure unit 94, as described below in connection with the operation ofthe assembling of the invention.

Each heat-insulating strip 92 is in the form of an elongated bar ofelastic deformable material, such as natural or synthetic rubberorcompounds thereof, or suitable synthetic plastic with rubber-likeproperties. 92 is in general also of approximately T-shaped or morespecifically of truncated sector-shaped cross-section in its relaxedcondition (FIGURE 5) with arcuate outer and inner surfaces 114 and 116and flat converging side surfaces 118. The convex outer side 114 has apair of grooves 120 therein spaced laterally apart from one another andalso spaced away from the opposite sides of the strip 92 bysubstantially the same distance as the flange extension 190 so as tosnugly receive the latter. The concave inner side 116 of the strip 92has a central groove 122 therein of approximately triangularcross-section with an entrance slot of restricted width, and this groove122 receives the two inner flange extensions 106 of the closure framemembers 88 and 90. The outer grooves 120 and the inner groove 122produce, in effect, enlarged ends 124 of approximately rectangularcross-section (FIGURE 5) on the insulating strip 92.

The modified insulating strip, generally designated 139, shown in FIGURE7 is similar to the insulating strip 92 of FIGURE 5, except that acable-like fulcrum member or core 132 of approximately circularcross-section and of harder elastic deformable material henceof higherdurometer test than the remainder of the strip is bonded thereto nearthe center thereof. Similar reference numerals are therefore used.

In the operation of assembling the modification 80 of FIGURES 4, 5 and 6or using the modified insulating strip 130, the outer and inner closureframe members 88 and 90 are assembled with the insulating strip 92 or139 by sliding these endwise relatively to one another with the flangeextensions 10!) and 106 sliding lengthwise along their respectivegrooves 120 and 122 and with the strip end portions 124 sliding alongtheir respective channels 198. When this subassembly has been completedas shown in FIGURE 5, the closure frame 82 is completed on three sidesas described above in connection with the arrangement 10 of FIGURES '1,2 and 3, leaving the fourth side open.

The operator then spreads the inner edges of the opposite closure framemembers 88 and 90 of each of the three sides of the incomplete closureframe 82 apart'from one another, such as by the use of a vise V similarto that shown in FIGURE 3 and with its jaws I and J similarly appliednear the outer corner edges (FIGURE 6). This action causes thecross-section of the insulating strip 92 or 130 to be deformed fromtruncated sector-shaped cross-section (FIGURES 5 and 7) to approximatelyrectangular cross-section (FIGURE '6) at the same time widening thecentral inner groove 122 of the insulating strip 92 or 130.

With the trough 112 opened up in this manner so that the opposite baseportions 96 of the closure frame members 88 and become divergent (FIGURE6) instead of convergent (FIGURE 5), the double-panelled closure unit 94is slid into place in the three troughs 1'12. The fourth side of theclosure frame 82 is then slid into place, completing the closure frame82 in a manner similar to that described above in connection with theoperation of the insulated double-panelled closure 19' of FIGURE 1. Theouter and inner closure frame members 88 and 90 of the closure frame 82are then released by the vise V or other spreading device, whereupon theresilience of the insulating strips 92 or forces the reversely-bentportions 102 of the closure frame members 88 and 90 into tightlygripping contact With the sealing member or layer 26 of the closure unit94 (FIGURE 4).

When the core-equipped insulating strip 139 of FIG- URE 7 is used, theoperation is similar to that described above, except that the core 132acts as a fulcrum around which flexing takes place, as described above.This con- The strip I struction provides a controlled flexing action of.improved uniformity.

What I claim is:

1. A heat-insulated metal frame structure for receiving closure panelsand the like comprising elongated external and internal metal closureframe components having base portions with facing surfaces disposed inlaterallyspaced relationship and having outer and inner edges, said baseportion of each frame component having an inner flange spaced away fromthe inner edge and providing a closure panel edge seat thereon, saidbase portion of each frame component also having an outer flange spacedapart from the inner flange and defining with said inner flange achannel bounded by said base portion and said flanges, said flanges ofsaid external and internal frame com ponents extending toward oneanother from their respective base portions and terminating in laterallyspaced relationship to one another, a wedging heat-insulating stripdevice of approximately T-shaped cross-section and of elastic deformableheat-insulating material mounted adjacent said closure panel edge seatsand disposed between and interconnecting said frame components, saidstrip device having a laterally-extending connecting portion withopposite sides seated in said channels and a wedging portion projectingoutwardly between said frame components toward said outer edge and ofsufficient thickness to dispose said base portions thereof ininwardlyconverging relationship relatively to one another in the relaxedcondition thereof before installation of a closure panel therein, andmeans for securing said connecting portion sides in said channels, saidheat-insulated structure being responsive to the insertion of a closurepanel in the closure panel edge seats of said closure frame componentsfor urging said base portions toward parallelism with one another whiledeforming said wedging portions.

2. A heat-insulated metal-framed closure, according to claim 1, whereinsaid outer flanges have flange extensions projecting from the edgesthereof substantially parallel to their respective base portions andwherein said wedging portion of said heat-insulating strip deviceresiliently engages and urges apart said flange extensions.

3. A heat-insulated metal-framed closure, according to claim 1, whereinsaid securing means includes retaining projections extending toward oneanother from the inner and outer flanges of each closure frame componentinto engagement with said connecting portion ends.

4. A heat-insulated metal-framed closure, according to portion of saidheat-insulating strip device resiliently en gages said flangeextensions.

7. A heat-insulated metal-framed closure, according to claim 1, whereinsaid heat-insulating strip device in its relaxed condition is ofapproximately truncated sectorshaped cross-section.

'8. A heat-insulated metal-framed closure, according to claim 7, whereinsaid heat-insulating strip in the inner side of the connecting portionthereof has a groove therein and wherein inner flanges have flangeextensions projecting outwardly into said groove.

9. A heat-insulated metal-framed closure, according to claim 1, whereinsaid heat-insulating strip is provided with an elongated core ofapproximately circular cross-section extending longitudinallytherethrough and connected thereto,

10. A heat-insulated metal-framed closure, according to claim 9, whereinsaid core is of elastic deformable material of greater hardness than thematerial of the remainder of said strip.

References Cited in the file of this patent UNITED STATES PATENTS2,138,374 Edwards Nov. 29, 1938' 2,611,156 Toth se tqzs, 1952 2,626,434Ike Jan. 27, 1953 2,723,427 Bobel Nov. 15, 1955 2,872,713 Haas Feb. 10,1959 2,898,643 Bush et al. Aug. 11, 1959 2,981,385 Osten Apr. 25, 19613,024,881 Haas Mar. 13, 1962 FOREIGN PATENTS 552,489 Canada Feb. 4, 1958

1. A HEAT-INSULATED METAL FRAME STRUCTURE FOR RECEIVING CLOSURE PANELSAND THE LIKE COMPRISING ELONGATED EXTERNAL AND INTERNAL METAL CLOSUREFRAME COMPONENTS HAVING BASE PORTIONS WITH FACING SURFACES DISPOSED INLATERALLYSPACED RELATIONSHIP AND HAVING OUTER AND INNER EDGES, SAID BASEPORTION OF EACH FRAME COMPONENT HAVING AN INNER FLANGE SPACED AWAY FROMTHE INNER EDGE AND PROVIDING A CLOSURE PANEL EDGE SEAT THEREON, SAIDBASE PORTION OF EACH FRAME COMPONENT ALSO HAVING AN OUTER FLANGE SPACEDAPART FROM THE INNER FLANGE AND DEFINING WITH SAID INNER FLANGE ACHANNEL BOUNDED BY SAID BASE PORTION AND SAID FLANGES, SAID FLANGES OFSAID EXTERNAL AND INTERNAL FRAME COMPONENTS EXTENDING TOWARD ONE ANOTHERFROM THEIR RESPECTIVE BASE PORTIONS AND TERMINATING IN LATERALLY SPACEDRELATIONSHIP TO ONE ANOTHER, A WEDGING HEAT-INSULATING STRIP DEVICE OFAPPROXIMATELY T-SHAPED CROSS-SECTION AND OF ELASTIC DEFORMABLEHEAT-INSULATING MATERIAL MOUNTED ADJACENT SAID CLOSURE PANEL EDGE SEATSAND DISPOSED BETWEEN AND INTERCONNECTING SAID FRAME COMPONENTS, SAIDSTRIP DEVICE HAVING A LATERALLY-EXTENDING CONNECTING PORTION WITHOPPOSITE SIDES SEATED IN SAID CHANNELS AND A WEDGING PORTION PROJECTINGOUTWARDLY BETWEEN SAID FRAME COMPONENTS TOWARD SAID OUTER EDGE AND OFSUFFICIENT THICKNESS TO DISPOSE SAID BASE PORTIONS THEREOF ININWARDLYCONVERGING RELATIONSHIP RELATIVELY TO ONE ANOTHER IN THE RELAXEDCONDITION THEREOF BEFORE INSTALLATION OF A CLOSURE PANEL THEREIN, ANDMEANS FOR SECURING SAID CONNECTING PORTION SIDES IN SAID CHANNELS, SAIDHEAT-INSULATED STRUCTURE BEING RESPONSIVE TO THE INSERTION OF A CLOSUREPANEL IN THE CLOSURE PANEL EDGE SEATS OF SAID CLOSURE FRAME COMPONENTSFOR URGING SAID BASE PORTIONS TOWARD PARALLELISM WITH ONE ANOTHER WHILEDEFORMING SAID WEDGING PORTIONS.